West Africa. Engraved by J. & C. Walker.
MLA
West Africa. Engraved by J. & C. Walker. Charles Knight & Co., 0AD. https://collections.library.yale.edu/catalog/15533539.
APA, 6th edition
West Africa. Engraved by J. & C. Walker. (0 C.E.). [Maps]. Charles Knight & Co., https://collections.library.yale.edu/catalog/15533539.